I have a Windows 10 PC (Acer R3 Aspire laptop) which was working fine, and then I wanted to get into the BIOS , but into the Win7 style BIOS, instead of the UEFI one. So when I changed to go into the old bios, now it gives an error message upon boot: "PXE-M0F: Existing PXE ROM. no bootable device -- insert boot disk and press any key"

(a) How do I restore the UEFI bios so that it'll work?
(b) how do I disable the wireless network card from the BIOS (the reason why I wanted to go into the classic bios)?

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